Advantages&colon;1&comma; SafeL Actively sending vessel's dynamic information lets around vessels equipped with AIS know its existence and direction in order to avoid collision accidents&period;L SOS message can be sent though pressing emergency call button when accidental situation occurs&period;2&comma; Real timeReal-time sending vessel's information at defined time&period; Sending frequency varies from status&period;AIS Class-B Speed ReportDifferent type of information has different time interval&comma; which requires different update speed&period;Static information&colon; Update once every 6 minutes or when data is revised&period;Dynamic information&colon; It depends on changing situation of sailing speed and sailing direction&period; Detailed data refers to following table&period;